Rezolvați in R ecuația :
a.(x-)(x+4)-2(3x-2)=(x-4)*;
b.(x+5)(x+2)-3(4x-3)=(x-5)*;
c.x(x+2)-13=(x-3)(x+3);
d.4x(x-1)=(2x+5)(2x-5)+1.

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